Method for detecting sealing performance of connection part of diaphragm wall

Abstract

The invention relates to a diaphragm wall joint sealing performance detection method, which is characterized in that a water stop strip is arranged in a cavity of a connecting end in a diaphragm wall, the water stop strip is electrically connected with a positive electrode of a detection end through a first conductive wire, a negative electrode of the detection end is connected with the top end of a second conductive wire, and the bottom end of the second conductive wire is connected with a heavy hammer. The detection end is in signal connection with the display end, the detection end provides a constant current, the display end collects a cathode voltage value corresponding to each tap position of a cathode cable of the second conductor wire, the resistance value is reduced, the cathode voltage value collected by the display end is reduced along with the reduction of the resistance value, and the detection end is in signal connection with the display end. According to the detection method, the limitation of a traditional sealing performance detection method is overcome, and the multi-frequency, efficient and accurate detection of the sealing performance of the joint of the ultra-long flexible vertical diaphragm wall is realized in a narrow-distance and ultra-deep slurry environment.

Description

technical field [0001] The invention relates to a method for detecting the sealing performance of joints of anti-seepage walls. Background technique [0002] For polluted site treatment projects, especially for polluted sites where pollution sources cannot be removed, due to the difficulty in subsequent horizontal anti-pollution construction at the bottom, building vertical cut-off walls around the site will become the main choice at this time. Among them, whether there are leaks at the junction of the anti-seepage wall will actually affect the anti-seepage effect. The detection method of the sealing performance of the joints of the cutoff wall is of great significance to the integrity of the flexible vertical cutoff wall (HDPE membrane) and to block the leakage of pollutants. [0003] At present, the methods that can be used to test the sealing performance include the water gun method, the electric spark method, and the high-density resistivity method. This type of detect...

AI Technical Summary

Problems solved by technology

[0004] The above detection methods are mostly used for testing the sealing performance of the joints of HDPE membranes laid on the plane, but in the process of testing the sealing performance of the joints of flexible vertical cut-off walls, there are certain limitations in the implementation of some testing procedures, and there are certain difficulties in multi-frequency testing

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